National Parks/Monuments
Tribal BoundariesThe tribal boundaries shown here are provided by the Bureau of Indian Affairs
and are intended to be used as a general spatial reference only. They are not a formal
determination of tribal boundaries by the EPA.

National Parks/Monuments
Tribal BoundariesThe tribal boundaries shown here are provided by the Bureau of Indian Affairs
and are intended to be used as a general spatial reference only. They are not a formal
determination of tribal boundaries by the EPA.

National Parks/Monuments
Tribal BoundariesThe tribal boundaries shown here are provided by the Bureau of Indian Affairs
and are intended to be used as a general spatial reference only. They are not a formal
determination of tribal boundaries by the EPA.

AQI: Good (0 - 50)
Air quality is considered satisfactory, and air pollution poses little or no risk.

AQI: Moderate (51 - 100)
Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

AQI: Unhealthy for Sensitive Groups (101 - 150)
Although general public is not likely to be affected at this AQI range, people with lung disease, older adults and children are at a greater risk from exposure to ozone, whereas persons with heart and lung disease, older adults and children are at greater risk from the presence of particles in the air.

Note: Values above 500 are considered Beyond the AQI. Follow recommendations for the Hazardous category. Additional information on reducing exposure to extremely high levels of particle pollution is available here.